<template>
  <div>
    <!--面包屑导航-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片视图区域-->
    <el-card>
      <!--提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!--步骤条区域-->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性 "></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!--tab栏区域-->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                :options="catelist"
                :props="{ expandTrigger: 'hover', ...this.cateProps }"
                v-model="addForm.goods_cat"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name="1">
            <!--渲染表单的item项-->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!--复选框组-->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!--上传图片-->
            <!--action表示图片要上传的后台Api地址-->
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headersObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!--富文本编辑器组件-->
            <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
            <!--添加商品的按钮-->
            <el-button type="primary" class="btnAdd" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!--图片预览-->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: 0,
      // 添加商品的表单对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详情
        goods_introduce: '',
        attrs: [],
      },
      // 校验规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' },
        ],
      },
      // 商品分类列表
      catelist: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
      },
      // 选择商品的动态参数列表数据
      manyTableData: [],
      // 选择商品的静态属性列表数据
      onlyTableData: [],
      // 上传图片的url地址
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件的headers请求头对象
      headersObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      // 预览图片的url
      previewPath: '',
      // 控制图片预览对话框的显示与隐藏
      previewVisible: false,
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 请求所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品失败!')
      }

      this.catelist = res.data
      // console.log(this.catelist)
    },
    // 级联选择器选中触发这个函数
    handleChange() {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    //
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将离开的标签也是'+oldActiveName)
      //  console.log('即将进入的标签也是'+activeName)
      //  return false
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    // tab栏切换时触发的事件
    async tabClicked() {
      // console.log(this.activeIndex)
      // 证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        // console.log('动态参数面板')
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'many' } }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('获取数据失败!')
        }

        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        console.log(res.data)
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败!')
        }

        // console.log(res.data)

        this.onlyTableData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      console.log(file)

      this.previewPath = file.response.data.url

      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove(file) {
      // console.log(file)
      // 1.获取将要删除的图片的临时路径

      const filePath = file.response.data.tmp_path

      // 2.从pics数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex((x) => {
        x.pic === filePath
      })

      // 3.调用数组中的splice方法，吧图片信息对象，从pics数组中移除
      this.addForm.pics.splice(i, 1)

      console.log(this.addForm)
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      console.log(response)
      // 1.拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2.将·图片信息对象，push到pics数组对象中
      this.addForm.pics.push(picInfo)
    },
    // 添加商品触发的事件
    add() {
      // console.log(this.addForm)
      this.$refs.addFormRef.validate( async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 执行添加的业务逻辑
        // 将goods_cat 数组转化为字符串 调用join方法
        // 进行一次深拷贝
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        
        // 处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' '),
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性

        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          }
          this.addForm.attrs.push(newInfo)
        })

        form.attrs = this.addForm.attrs
        console.log(form)

        // 发起请求添加商品的请求
        // 商品的名称必须是唯一的
      const {data:res} = await this.$http.post('goods',form)

      if(res.meta.status !== 201){
        return this.$message.error('添加商品失败!')
      }

      this.$message.success('添加商品成功')

      this.$router.push('/goods')
      })
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
  },
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>
